
Stax
Payment Processing Platforms
Subscription-based payment processing platform offering interchange-plus pricing and payments automation.
Price$99 / month
Price position: below the category median.
Payment Processing Platforms
Subscription-based payment processing platform offering interchange-plus pricing and payments automation.
Price$99 / month
Price position: below the category median.Billing & Invoicing
Free open-source invoicing platform with time tracking, proposals, and payment processing for freelancers and small teams.
Price$14 / month
Price position: above the category median.Billing & Invoicing
Free invoicing and proposal tool for freelancers with time tracking, expense management, and payment processing by Fiverr.

Billing & Invoicing
Financial and contracts platform for wedding and event professionals with invoicing and payments.
Price$29 / month
Price position: above the category median.
Billing & Invoicing
Lago is an open-source metering and billing platform for usage-based pricing, providing real-time event processing, flexible pricing models, and automated invoicing.
Payment Processing Platforms
B2B payment processing platform with Level II/III data processing for reduced interchange rates and virtual terminal.

Billing & Payments
Legal payments platform with online invoicing, credit card and ACH processing, and client payment plans designed for law firm compliance.
PriceUsage-based

Billing & Invoicing
Free online invoicing software for European freelancers and small businesses with recurring invoices and payment tracking.
Payment Processing Platforms
Online payment collection platform for groups and organizations with customizable forms, invoicing, and reporting.
Price$15 / month
Price position: below this category's displayed range.Payment Processing Platforms
Global payment processing and merchant acquiring company with integrated billing and payment acceptance solutions.